The authors examine how adversity related to poverty affects child development through experiential canalization, which is how biology and experience shape behaviors. Experiences like stressful environments and disrupted relationships due to economic hardship can negatively impact children's stress physiology, cognitive functions, and self-regulation. The authors integrate research in these areas to consider how children adapt in response to adversity and how this relates to their development. They argue that interventions should aim to alter children's experiences to promote healthier development.
Baldwin effect and cultural explanation, Biological Explanations, Natural selection, Survival of the fittest, Intelligence as Evolutionary Spandrel, group selection, sexual selection, the Baldwin effect, the Language Acquisition Device, or LAD, Hinton and Nowlan (1987) ran a computer simulation using a “sexually reproducing” population of neural networks, Cultural Explanations of Intelligence,
Carol Dweck (1975) The Role of Expectations and Attributions in the Alleviation of Learned Helplessness. Journal of Personality and Social Psychology, 33/4 : 674-685
Baldwin effect and cultural explanation, Biological Explanations, Natural selection, Survival of the fittest, Intelligence as Evolutionary Spandrel, group selection, sexual selection, the Baldwin effect, the Language Acquisition Device, or LAD, Hinton and Nowlan (1987) ran a computer simulation using a “sexually reproducing” population of neural networks, Cultural Explanations of Intelligence,
Carol Dweck (1975) The Role of Expectations and Attributions in the Alleviation of Learned Helplessness. Journal of Personality and Social Psychology, 33/4 : 674-685
Flight Dental Systems - A2 Operatory PresentationFLIGHT DENTAL
A2 Operatory Presentation - Flight Dental Systems- Canadian owned and Operated Dental Chair and Delivery Unit Manufacturer - With sales in over 25 countries and growing. Licensed to sell in Europe, Canada, USA, Mexico, Australia and Saudi Arabia. Contact us for more details if you have any inquires
Solemos guardar el carro, las llaves, el dinero, hasta al perro guardamos, pero, a veces olvidamos guardar nuestro corazón de malos comentarios, calumnias, chismes o diferencias y eso nos puede llenas de rencor, amargura y muchas veces de deseos de venganza, te invito a leer esta pequeña reflexión que te puede ayudar a saber guardar tu corazón.
Flight Dental Systems Sales Presentation 2015 rev. 2.0FLIGHT DENTAL
Flight Dental Systems features an extensive product line that includes, dental chairs , dental lights, dental led curing lights, LED Curing Lights, LED Operating Lights, Delivery Units, Ceiling Mounted lights, track lights and scalers. We are a trusted and well recognized dental chair manufacturer base in Brampton Canada.
Running head IMPACTS OF CHILD ABUSE ON GROWTH AND DEVELOPMENT.docxcowinhelen
Running head: IMPACTS OF CHILD ABUSE ON GROWTH AND DEVELOPMENT
1
IMPACTS OF CHILD ABUSE ON GROWTH AND DEVELOPMENT
11
Impacts of Child Abuse on Growth and Development
Tasha Smith
Ashford University
LIB495: Capstone - Advanced Research Project
05/18/2017
Introduction
In the United States, child abuse is one of the aspects that require a compelling attention from the government, the non-governmental organizations, society, and even individuals. Reports exhibit that nearly six million young people are abused annually. The Center for Disease Control and Prevention (CDC) has identified the aspect to be one of the serious problems that the United States is facing, and for this reason, a compelling remedy is required. It is perceived that there is a probability that a child who undergoes physical and psychological abuse is prone to abuse his or her children when he or she becomes an adult (Starr & Wolfe, 1991). According to the United States Bureau of Health and Human Services, it is essential for parents and guardians to ensure that children are not abused in the society.
Statement of the Problem
The impacts of child abuse from early stages through adulthood have been examined for many years. Child abuse is a very regular practice in the United States with more than six million kids influenced each year (Centers for Disease Control and Prevention [CDC], 2014). It is thought to be a serious issue, particularly as the cycle of abuse proceeds since approximately 30% of abusing and disregarded kids will later abuse their own kids (U.S. Bureau of Health and Human Services [HSS], 2013). The effects of abuse on the child using Erikson's hypothesis of psychosocial improvement, the resulting impacts of the abuse on developing grown-ups, and treatment systems, which have turned out to be of help when working with customers who have experienced childhood abuse. It has got several effects on the development and the growth of children later in life (Kelley, Bravo, Braitman, Lawless, & Lawrence, 2016). It is due to this situation that this study will seek to find the impacts of Child Abuse on Growth and Development.
Objective of the study:
To determine the Impacts of Child Abuse on Growth and Development
Research Questions.
1) How do child abuses influence growth and development of a child?
2) To what extent do child abuses affect the growth and development of a child?
3) Do child abuse influence or determine a person’s behavior at adulthood?
4) Is there a likelihood of a child who has been abused to become abusive at adulthood?
5) How do the abused children get along with other children?
Literature review
Erikson depicts one of the main stages prompting adulthood as personality versus part disarray (Lewis, McElroy, Harlaar, & Runyan, 2016). This stage is regularly experienced amid the high school years; in this stage, teenagers encounter an” identity emergency", which is portrayed as an endeavor to characterize who you may be (e.g., vocation, religion, ...
Ecopsychology in Relationship between School Students and the Natural Worldijcnes
Ecopsychology studies the relationship between human beings and the natural world through ecological and psychological principles. The field seeks to develop and understand ways of expanding the emotional connection between individuals and the natural world, thereby assisting individuals with developing sustainable lifestyles and remedying alienation from nature. We describe specific examples using a pedagogical framework for helping School students to engage, explore, explain, and elaborate the psychology behind nature. This approach should better prepare students with an understanding that ecological knowledge must be integrated with solutions that address psychological barriers if efforts to alter behavior related to nature world are to succeed.
Vo l u m e 3 4 N u m b e r 2 J u n e 2 0 0 9 31The Au.docxdickonsondorris
Vo l u m e 3 4 N u m b e r 2 J u n e 2 0 0 9 31
The Australian Early Development Index, who does it measure:
Piaget or Vygotsky’s child?
Joseph Agbenyega
Faculty of Education, Monash University
sEVErAL PsyChOLOgICAL InsTruMEnTs have been developed and used over
the years to measure various domains of child development. The Australian Early
Development Index (AEDI) is a current assessment tool being used as a community
measure of young children’s development. It measures the following domains: Physical
health and wellbeing; Social competence; Emotional maturity; Language and cognitive
skills; Communication skills and general knowledge. This article examines the tacit
nuanced construction of the child within the AEDI, and critiques this within a cultural-
historical theoretical perspective of child development. The paper argues that the AEDI
image of the child has its roots in Piagetian and Gesellian stage theories of universality.
This position is juxtaposed with more encompassing views held in the Vygotskian
tradition. The paper advances arguments for an alternative consideration of child
development that does not prescribe vulnerability to certain groups of children.
Introduction
In ThIs PAPEr I WILL explore three different
theoretical traditions of development—Piaget, Gesell
and Vygotsky—focusing on the root belief structures.
Following this effort I will analyse how each theoretical
orientation shapes the Australian Early Development
Index (AEDI). I will then concentrate on the contribution
of Vygotsky’s cultural–historical theory to reframe a more
comprehensive view of looking at child development
and measurement. The purpose for doing this is to
tease out the tacit deficit model in the AEDI and how
its universal usage creates and prescribes vulnerability
to certain groups of children.
Theoretical perspectives on child
development
This section begins by unpacking the important
components of Piaget’s cognitive developmental
theory, followed by Gesell’s and Vygotsky’s as these
relate to the AEDI. The choice of Piaget’s and Gesell’s
philosophical positions are important to this paper
because these traditions often provide the framework
for constructing psychometric tests for measuring
school readiness from a maturational and biological
perspective, as does the AEDI. On the other hand,
Vygotsky’s cultural–historical theory is considered in
this paper as it provides an alternative and a broader
philosophical framework beyond a maturational
and biological perspective for thinking about child
development and school readiness.
Views about development are situated within broader
systems of theoretical knowledge. Damon (1998)
argues that the field of child development within the
last century was dominated by ‘three grand systems’:
Piaget, psychoanalysis and learning theory (p. xv).
Jean Piaget is renowned for his work on cognitive
development of children. His work focused on the
processes ...
Flight Dental Systems - A2 Operatory PresentationFLIGHT DENTAL
A2 Operatory Presentation - Flight Dental Systems- Canadian owned and Operated Dental Chair and Delivery Unit Manufacturer - With sales in over 25 countries and growing. Licensed to sell in Europe, Canada, USA, Mexico, Australia and Saudi Arabia. Contact us for more details if you have any inquires
Solemos guardar el carro, las llaves, el dinero, hasta al perro guardamos, pero, a veces olvidamos guardar nuestro corazón de malos comentarios, calumnias, chismes o diferencias y eso nos puede llenas de rencor, amargura y muchas veces de deseos de venganza, te invito a leer esta pequeña reflexión que te puede ayudar a saber guardar tu corazón.
Flight Dental Systems Sales Presentation 2015 rev. 2.0FLIGHT DENTAL
Flight Dental Systems features an extensive product line that includes, dental chairs , dental lights, dental led curing lights, LED Curing Lights, LED Operating Lights, Delivery Units, Ceiling Mounted lights, track lights and scalers. We are a trusted and well recognized dental chair manufacturer base in Brampton Canada.
Running head IMPACTS OF CHILD ABUSE ON GROWTH AND DEVELOPMENT.docxcowinhelen
Running head: IMPACTS OF CHILD ABUSE ON GROWTH AND DEVELOPMENT
1
IMPACTS OF CHILD ABUSE ON GROWTH AND DEVELOPMENT
11
Impacts of Child Abuse on Growth and Development
Tasha Smith
Ashford University
LIB495: Capstone - Advanced Research Project
05/18/2017
Introduction
In the United States, child abuse is one of the aspects that require a compelling attention from the government, the non-governmental organizations, society, and even individuals. Reports exhibit that nearly six million young people are abused annually. The Center for Disease Control and Prevention (CDC) has identified the aspect to be one of the serious problems that the United States is facing, and for this reason, a compelling remedy is required. It is perceived that there is a probability that a child who undergoes physical and psychological abuse is prone to abuse his or her children when he or she becomes an adult (Starr & Wolfe, 1991). According to the United States Bureau of Health and Human Services, it is essential for parents and guardians to ensure that children are not abused in the society.
Statement of the Problem
The impacts of child abuse from early stages through adulthood have been examined for many years. Child abuse is a very regular practice in the United States with more than six million kids influenced each year (Centers for Disease Control and Prevention [CDC], 2014). It is thought to be a serious issue, particularly as the cycle of abuse proceeds since approximately 30% of abusing and disregarded kids will later abuse their own kids (U.S. Bureau of Health and Human Services [HSS], 2013). The effects of abuse on the child using Erikson's hypothesis of psychosocial improvement, the resulting impacts of the abuse on developing grown-ups, and treatment systems, which have turned out to be of help when working with customers who have experienced childhood abuse. It has got several effects on the development and the growth of children later in life (Kelley, Bravo, Braitman, Lawless, & Lawrence, 2016). It is due to this situation that this study will seek to find the impacts of Child Abuse on Growth and Development.
Objective of the study:
To determine the Impacts of Child Abuse on Growth and Development
Research Questions.
1) How do child abuses influence growth and development of a child?
2) To what extent do child abuses affect the growth and development of a child?
3) Do child abuse influence or determine a person’s behavior at adulthood?
4) Is there a likelihood of a child who has been abused to become abusive at adulthood?
5) How do the abused children get along with other children?
Literature review
Erikson depicts one of the main stages prompting adulthood as personality versus part disarray (Lewis, McElroy, Harlaar, & Runyan, 2016). This stage is regularly experienced amid the high school years; in this stage, teenagers encounter an” identity emergency", which is portrayed as an endeavor to characterize who you may be (e.g., vocation, religion, ...
Ecopsychology in Relationship between School Students and the Natural Worldijcnes
Ecopsychology studies the relationship between human beings and the natural world through ecological and psychological principles. The field seeks to develop and understand ways of expanding the emotional connection between individuals and the natural world, thereby assisting individuals with developing sustainable lifestyles and remedying alienation from nature. We describe specific examples using a pedagogical framework for helping School students to engage, explore, explain, and elaborate the psychology behind nature. This approach should better prepare students with an understanding that ecological knowledge must be integrated with solutions that address psychological barriers if efforts to alter behavior related to nature world are to succeed.
Vo l u m e 3 4 N u m b e r 2 J u n e 2 0 0 9 31The Au.docxdickonsondorris
Vo l u m e 3 4 N u m b e r 2 J u n e 2 0 0 9 31
The Australian Early Development Index, who does it measure:
Piaget or Vygotsky’s child?
Joseph Agbenyega
Faculty of Education, Monash University
sEVErAL PsyChOLOgICAL InsTruMEnTs have been developed and used over
the years to measure various domains of child development. The Australian Early
Development Index (AEDI) is a current assessment tool being used as a community
measure of young children’s development. It measures the following domains: Physical
health and wellbeing; Social competence; Emotional maturity; Language and cognitive
skills; Communication skills and general knowledge. This article examines the tacit
nuanced construction of the child within the AEDI, and critiques this within a cultural-
historical theoretical perspective of child development. The paper argues that the AEDI
image of the child has its roots in Piagetian and Gesellian stage theories of universality.
This position is juxtaposed with more encompassing views held in the Vygotskian
tradition. The paper advances arguments for an alternative consideration of child
development that does not prescribe vulnerability to certain groups of children.
Introduction
In ThIs PAPEr I WILL explore three different
theoretical traditions of development—Piaget, Gesell
and Vygotsky—focusing on the root belief structures.
Following this effort I will analyse how each theoretical
orientation shapes the Australian Early Development
Index (AEDI). I will then concentrate on the contribution
of Vygotsky’s cultural–historical theory to reframe a more
comprehensive view of looking at child development
and measurement. The purpose for doing this is to
tease out the tacit deficit model in the AEDI and how
its universal usage creates and prescribes vulnerability
to certain groups of children.
Theoretical perspectives on child
development
This section begins by unpacking the important
components of Piaget’s cognitive developmental
theory, followed by Gesell’s and Vygotsky’s as these
relate to the AEDI. The choice of Piaget’s and Gesell’s
philosophical positions are important to this paper
because these traditions often provide the framework
for constructing psychometric tests for measuring
school readiness from a maturational and biological
perspective, as does the AEDI. On the other hand,
Vygotsky’s cultural–historical theory is considered in
this paper as it provides an alternative and a broader
philosophical framework beyond a maturational
and biological perspective for thinking about child
development and school readiness.
Views about development are situated within broader
systems of theoretical knowledge. Damon (1998)
argues that the field of child development within the
last century was dominated by ‘three grand systems’:
Piaget, psychoanalysis and learning theory (p. xv).
Jean Piaget is renowned for his work on cognitive
development of children. His work focused on the
processes ...
Sibling Birth Spacing Influence on Extroversion, Introversion and Aggressiven...inventionjournals
Sibling spacing refers to the birth interval between consecutive children in the family. The family is the basic unit of socialization. Family interactions and other dynamics such as birth order and sibling spacing shape the personality of children. This study investigated the relationship between sibling birth spacing and, extroversion and introversion characteristics of adolescents in Nairobi, Kenya. The study adopted mixed methods research paradigm with the correlation design. Purposive and simple random sampling techniques were used to select three schools for the study sample and participants. From each of the three schools, twenty five students were selected to make a total sample of 75 participants. The data collection instruments for the study were standardized questionnaires and observation guides. Data was collected and analyzed using Pearson correlation analysis and Analysis of Variance. The study concluded that close sibling spacing tends to produce extraverted and highly aggressive children while wide sibling spacing tends to produce introverted and less aggressive children. The study further found that the only children, ranked highest in introversion and, lowest in aggressiveness and extraversion. The study recommended that sibling spacing knowledge should be used by school career guidance masters as locally available method of predicting personality.
2. typical experience associated with socioeconomic status
(SES) affects child development. It is well established that
the material and psychosocial contexts of poverty adversely
affect multiple aspects of development in children (Bradley
& Corwin, 2002; Duncan & Brooks-Gunn, 2000; Noble,
McCandliss, & Farah, 2007). Poverty affects where and
how family members live, limiting housing options to those
that are often characterized by higher levels of crowding,
violence, and lack of safety (Evans, 2004; Kohen, Lev-
enthal, Dahinten, & McIntosh, 2008). Economic hardship
exacerbates conflict between adults, with children in poor
households facing a higher probability of disrupted social
relationships with key adults in their lives (Watson &
McLanahan, 2011). As parents struggle with a range of
stressors, the probability of parents’ depressive symptoms,
emotional distress, and expressions of anger and aggression
in the household also rises, with cascading effects on
children’s psychological development (Ackerman &
Brown, 2010; Foster & Brooks-Gunn, 2009; Molnar, Buka,
Brennan, Holton, & Earls, 2003). Children in conditions of
Clancy Blair economic hardship face a wide array of dangers (e.g.,
higher probability of exposure to environmental teratogens
such as lead, higher levels of noise and crowding, and
lower levels of household and neighborhood safety) and
ment are not simply encoded in DNA or present in the simultaneously lower access to supportive environments,
environment in a predetermined sense (Oyama, 2000); such as high-quality child care (Brooks-Gunn & Duncan,
rather, genetic information and environmental information 1997).
coactively and probabilistically determine behavioral and The material and psychosocial hardships of poverty
psychological development. are very real, and their effects on development are often
Without reference to experiential canalization, little in severe. As such, these effects, generally speaking, have
development makes sense. That is, without taking into tended to be characterized within a deficit model in which
account functional relations across levels of analysis, ex-
children are seen as lacking specific inputs, whether envi-
planations for processes of development become overly
ronmental or genetic or both, that are needed to avoid
determined, and the individual contributions of either biol-
ogy or experience, of nature or nurture, are overemphasized compromised development. For example, a gradient be-
(Lickliter & Honeycutt, 2003). Accordingly, experiential tween the amount of input, such as maternal language, and
canalization, or the selective optimization of behavior in output, such as vocabulary development in children, is well
response to experience, is a central aspect of what is known established and has been shown to covary with income
as the developmental psychobiological model. This model (Hart & Risley, 1985). Consideration of the context of
offers a framework for understanding the implications of poverty only from a deficit-oriented, input– output perspec-
developmental trade-offs, of opportunities taken or fore- tive on child development, however, is of less theoretical
closed, that are inherent in distinct developmental path- and empirical value than one might hope. An important
ways. Such a perspective on development provides for feature of the experiential canalization model is that it
greater complexity and specificity as well as for greater indicates the relevance of focusing not only on the absence
probability of change or reversibility than is implied by an of particular types of stimulation but also on the presence
additive or simple interactive model of biological and en- of alternative types of stimulation that actively shape de-
vironmental inputs leading to child outcomes. velopment to meet a specific set of contingencies. Although
cognition and behavior in children from low-income homes
Poverty, Parenting, and the are often clearly differentiated from those of their middle-
Psychobiology of Self-Regulation income counterparts, there is little to suggest that the mech-
In this article we apply the developmental psychobi- anisms underlying the observed differences, whether de-
ological model of experiential canalization to research on fined in terms of environmental factors or in terms of
children’s development in the context of poverty-related genetic similarity, are best explained in an additive, input–
adversity in an effort to break new ground for interpreting output fashion. The principle of experiential canalization
recent research findings and for designing future research indicates the need to focus on the ways in which variables
and preventive and therapeutic interventions. Consider- across levels of analysis, from the genetic to the social,
ation of psychobiological processes may be particularly combine to shape development in favor of one trajectory
important for understanding the ways in which variation in over another and to promote continuity for good and for ill.
310 May–June 2012 ● American Psychologist
3. which cognitive and social-emotional development in early
childhood is shaped by experience—most specifically, the
development of neural systems important for self-regula-
tion, defined here as the primarily volitional regulation of
attention, emotion, and executive functions for the pur-
poses of goal-directed actions (Blair & Ursache, 2011).
The basis for the experiential canalization model of
self-regulation development is found in a number of animal
models that examined the effects of early experience on
development. This research (primarily with rats) has dem-
onstrated that chronic stress in the prenatal and/or very
early neonatal periods has multiple negative sequelae.
These studies demonstrate that early stress alters gene
expression and induces structural changes as well as
changes in connectivity in brain areas that underlie stress
response physiology (Karssen et al., 2007; Liston et al.,
2006; Patel, Katz, Karssen, & Lyons, 2008; Radley, Arias,
& Sawchenko, 2006). In turn, alteration of stress response
physiology influences activity in neural systems that un-
derlie self-regulation abilities, including executive func-
C. Cybele tions (Cerqueira, Mailliet, Almeida, Jay, & Sousa, 2007;
Raver Holmes & Wellman, 2009), or what can be considered
tendencies to a more reflective or more reactive response to
experience. This is because stress hormones are modulators
of neural activity in the brain (Arnsten, 2000; Yuen et al.,
Experiential Canalization of
2009) and at moderate levels of increase lead to long-term
Development in Low- Versus synaptic potentiation in corticolimbic circuitry associated with
High-Resource Environments prefrontal cortex (PFC), the seat of executive function abili-
Recent advances in neuroscience and neuropsychology il- ties. At very high or very low levels of neuroendocrine in-
lustrate the developmental psychobiological model and ex- crease, however, synaptic activity in PFC circuitry is de-
periential canalization of self-regulation development in creased, and activity in brain systems associated with more
children. In the model shown in Figure 1, characteristics of reactive forms of learning and behavior is increased (Ramos
the environment influence parents’ psychological function- & Arnsten, 2007; Segal, Richter-Levin, & Maggio, 2010).
ing and in turn the quality of caregiving they provide. Given the relations among the constructs in Figure 1,
Quality of caregiving is then in turn hypothesized to act as it appears that one way in which early experience may
a key mediator of the linkage between children’s exposure shape or program the development of the organism is by
to poverty-related hazard and subsequent physiological, altering neural connectivity and sensitivity to neuroendo-
neurobiological, and cognitive development. In this pro- crine levels in pathways that underlie tendencies to more
cess, the development of stress physiology is a central reactive as opposed to more reflective responses to expe-
component of the model, one in which stress hormone rience. With an increasingly established relation between
levels act as a primary canalizer or mechanism through stress hormone levels and self-regulation, a central research
Figure 1
Model of the Experiential Canalization of Self-Regulation Development
May–June 2012 ● American Psychologist 311
4. question concerns the extent to which effects of environ- to stress and immune system functioning. Recent epidemi-
mental quality on the neural substrate that supports self- ological findings suggest that low SES is consistently re-
regulation are mediated by and can be remediated through lated to poorer health in later life (Jackson et al., 2004;
early experience, particularly early caregiving. The idea Miller et al., 2009). One mechanistic interpretation of these
that caregiving acts as a key mediator of the effect of findings is that alterations to stress and immune system
poverty on child development has been shown in a number functioning in children in low-SES homes represent an
of studies (McLoyd, 1998). Research on early experience adaptive trade-off. For example, low-SES background has
in animal models indicates the psychobiological shaping of been associated with up-regulation of genes associated with
behavior and cognition through early caregiving effects on adrenergic function and down-regulation of genes associ-
stress physiology. In one widely cited example, Meaney ated with the regulation of the hypothalamic–pituitary–
and collaborators (Meaney & Szyf, 2005) have shown that adrenal (HPA) axis (Miller et al., 2009). Increased adren-
variation in naturally occurring maternal behavior in the rat ergic and glucocorticoid responses to stimulation would
during the offspring’s first eight postnatal days is associ- enable a more reactive and faster response to threats, both
ated with the expression of a gene that codes for the density physical and psychosocial, and as such would confer an
of neural receptors for glucocorticoids in the hippocampus. advantage in unsafe environments. Such a trade-off, how-
This effect is a highly meaningful one in that glucocorti- ever, would come with short- and long-term costs to health
coid receptor density is central to the regulation of neu- and well-being that would preferentially shape physical and
roendocrine levels, which, as noted above, are highly rel- psychological development along particular trajectories
evant to the activity in brain areas associated with more while limiting the likelihood of development along others.
volitional and proactive responses to stimulation (Robbins The experiential canalization approach offers a
& Arnsten, 2009) and with complex learning and memory sharper lens through which to reexamine models of poverty
(Liu, Diorio, Day, Francis, & Meaney, 2000). and child development. Although research on the canaliza-
Although there are many interesting aspects of the tion of development through caregiving and stress physi-
developmental process linking early caregiving experience ology is in an early stage, a growing number of studies
to later behavior in the animal models described above, one provide a neurobiological basis for well-documented asso-
of the most important from the standpoint of developmental ciations between poverty and child physical and psycho-
psychobiology is that variation in the maternal behaviors in
logical health and development. For example, a longitudi-
the rat that initiate the cascade from the behavioral to the
nal study with pre- and early adolescent children has
genetic level and back again is in part driven by the quality
demonstrated that a cumulative risk index composed of
of the environment in which development is occurring. The
psychosocial and physical characteristics of the home en-
idea here is that environmental quality leads to particular
vironment differentiated high- from low-SES homes and
types of caregiving behaviors that initiate a physiological
was positively and linearly associated with an index of
cascade leading to patterns of development that are appro-
priate or beneficial for that environment (Cameron et al., stress physiology biomarkers in children that included car-
2005; Meaney, 2001, 2010). Such coactions among genes, diovascular function, body mass index, and overnight lev-
behavior, and environments provide new insight into pro- els of catecholamines and cortisol. Furthermore, the risk
cesses of development. These and other studies provide index was associated with reduced delay of gratification,
growing evidence to support the idea that early caregiving increased learned helplessness, greater psychological dis-
and stress physiology serve as primary conduits or sources tress, and reduced working memory in children, indicating
of information in a developmental system. As such, early links among poverty, stress physiology, and self-regulation
caregiving can be understood to shape the development of (Evans, 2003; Evans & English, 2002; Evans & Scham-
child behavior in ways that are appropriate for the context berg, 2009).
in which development is occurring. A second longitudinal study beginning at birth that we
have been conducting with a large group of collaborators
Adaptation and Change in Development has followed a sample of 1,292 children from predomi-
The notion of developmental trade-offs in the experiential nantly low-income and nonurban communities. This study,
canalization approach is consistent with a rationale for known as the Family Life Project, has demonstrated that
future research that might profitably investigate the idea poverty is associated with elevated cortisol in infancy and
that adversity in the context of poverty shapes neural de- early childhood and that this association is mediated
velopment and perhaps also molecular genetic processes through characteristics of the household (Blair, Raver, et
and leads to adaptations in behavior and mental states that al., 2011; Hibel, Granger, Blair, Cox, & the Family Life
are relevant to that environment. Adaptive shaping of be- Project Investigators, 2011). Furthermore, this study has
havior in low-resource environments, however, should not shown that, as outlined above, parenting sensitivity medi-
be taken to imply the development of necessarily optimal ates the relation between poverty and stress physiology
or desirable states of functioning. On the contrary, adapta- (Blair et al., 2008; Mills-Koonce et al., 2011) and that, in
tion to low-resource environments involves short-term combination, parenting sensitivity and elevated cortisol
“benefits” as well as long-term “costs” to the organism, mediate the association between poverty and low levels of
both psychologically as well as physically, that are due to executive function abilities in children (Blair, Granger, et
increased stress on organ systems resulting from alterations al., 2011).
312 May–June 2012 ● American Psychologist
5. Studies of young children in conditions of more ex- adaptations but potentially harmful long-term sequelae. In
treme forms of compromised caregiving involving neglect the context of maltreatment specifically, or in low-resource,
and maltreatment in infancy and early childhood also pro- unpredictable caregiving environments more generally, al-
vide evidence of experiential canalization in the context of tered HPA axis responsivity, biased attributional style, and
adversity. Children who have experienced exceptionally hypervigilance to environmental cues allow for more rapid
harsh treatment from caregivers demonstrate alterations to learning and response to conditions of threat (Champagne
HPA axis function including hyperactivity followed by et al., 2008; Pollak, 2008). These processes, however, also
later hyporeactivity (Gunnar, Fisher, & the Early Experi- increase the chances of negative interpersonal interactions
ence, Stress, and Prevention Network, 2006). An important and high levels of difficulty in social contexts such as
aspect of this model is that it can be extended to include school (Cicchetti & Rogosch, 2009).
exposure to aggression from peers as well as adults. In a Attention to potential exchanges or trade-offs that
sample of monozygotic twins discordant for the experience make given behaviors rewarded and rewarding versus
of bullying, the bullied members of the twin pairs showed problematic provides insight into ways that poverty-related
blunted, or hyporesponsive, cortisol secretion in response adversity may profoundly shape children’s development.
to a lab stressor compared with their nonbullied but genet- Attention to these trade-offs, however, also underscores
ically identical counterparts (Ouellet-Morin et al., 2011). In ways in which neurocognitive and behavioral profiles of
contrast, the nonbullied twins showed an expected increase self-regulation can be altered. A central implication of the
in cortisol secretion in response to the moderately stressful experiential canalization approach is that the shaping of
lab task. These findings highlight the neurophysiological development by experience offers an opportunity for repair
and behavioral trade-offs that accompany the process of and reversal. Just as the system is open to shaping and
experiential canalization in the face of environmental selective optimization in the face of high levels of disad-
adversity. In discussing their findings, the investigators vantage, so too might the system be reoptimized to meet
squarely considered these trade-offs and addressed the changing environmental demands and conditions. A san-
question of whether the blunted, hyporesponsive HPA guine implication of models of experiential canalization,
axis profile demonstrated by the bullied children’s re- however, is that there are few if any opportunities for an
sponse to psychosocial stress was “adaptive or detrimen- “easy fix”: In setting aside input– output models of devel-
tal” (Ouellet-Morin et al., 2011, p. 580). opment, seemingly straightforward solutions for altering
Here development may be giving with one hand— children’s self-regulation and executive function will have
conferring developmental advantage through blunting of a lower probability of success than will interventions that
the HPA axis to protect the brain from iatrogenic effects of take canalizing processes across multiple levels into ac-
prolonged cortisol elevations—while taking away with the count.
other—the blunting of the cortisol response leading to
longer term health costs. This set of trade-offs is mani- Repair Through Mediating Mechanisms of
fested at the behavioral level as well in that chronic expo- Caregiving
sure to others’ anger and aggression tunes children’s atten- In the developmental psychobiological framework, experi-
tion and responsiveness in favor of heightened vigilance to ential and biological influences on development are highly
emotionally negative stimuli (Cicchetti & Rogosch, 2009; intertwined. For this reason, supporting adults to maintain
Pollak, Messner, Kistler, & Cohn, 2009; Pollak, Vardi, high levels of responsiveness, consistency, and warmth can
Putzer Bechner, & Curtin, 2005). Such heightened vigi- be expected to lead to more flexible regulation of stress
lance may be beneficial in the short run, keeping children physiology with cascading influences on child self-regula-
alert and ready to respond when facing potentially threat- tion. A considerable body of research in prevention science
ening situations or interactions at home or at school. That demonstrates that parenting intervention can be successful
same level of behavioral vigilance may translate to a level in altering the quality of caregiving that adults provide to
of wariness or reticence with unfamiliar teachers and peers young children while those adults navigate a large number
that carries longer term social costs. These findings provide of stressful poverty-related hazards. Recent parent training
support for the idea that chronic exposure to adversity, such programs have shown significant success in helping adults
as can occur more frequently in the context of poverty, to acquire new caregiving goals and schema, alter their use
actively shapes physiological and behavioral development of negative forms of discipline, and engage in more sensi-
in ways that are adaptive for that context. tive and responsive and less coercive and inept forms of
caregiving, with short-term reductions in young children’s
Implications of Experiential Canalization for
behavioral dysregulation (Brotman, Gouley, Klein, Cas-
Reversibility, Reoptimization, and
tellanos, & Pine, 2003; Dishion et al., 2008; Dozier et al.,
Intervention
2009; Izard, Sann, Spelke, & Streri, 2009; Landry, Smith,
As noted above, physiological, cognitive, and behavioral Swank, & Guttentag, 2008; Mendelsohn et al., 2005; Web-
adaptations to the context of adversity and compromised ster-Stratton, 1998).
caregiving can result in objectively worse chances of pos- For example, implementation of multiple years of the
itive life course outcomes. Applied to children in poverty, SAFEChildren intervention supporting parenting practices
such a psychobiological process in development might among low-income families facing high levels of violence
understandably be associated with short-term “beneficial” led to significant increases in parents’ use of more stable,
May–June 2012 ● American Psychologist 313
6. consistent forms of caregiving and limit setting, with con- dismissiveness, disengagement, and withdrawal (Dozier,
comitant improvements in children’s regulation of atten- 2005; Dozier et al., 2009). In light of this cycle of escalat-
tion, impulsivity, and behavior (Tolan, Gorman-Smith, ing dysregulation and withdrawal, Dozier and colleagues
Henry, & Schoeny, 2009). Effect sizes of these interven- (2009) designed their intervention to support foster parents’
tions range from small impacts with “dilute” forms of ability to structure a set of environmental contingencies
intervention (see Dishion et al., 2008) to larger effect sizes that might canalize children’s more optimal trajectories of
for more intensive intervention efforts (e.g., d ϭ .5 for regulation over time. In so doing, the interventionists con-
improvement in responsive caregiving and child attention sidered that there are also significant trade-offs in shifting
deployment; Landry et al., 2008). An essential point from into new patterns of emotional regulation and that caregiv-
the perspective of the experiential canalization of develop- ers need to be supported in making greater investments in
ment is that these models of parent skills training often approaching rather than withdrawing during emotionally
engage parents through attention to parents’ own regulatory negative bouts of interaction with their foster children. The
profiles of affect, behavior, and cognition in conditions of implication from such an approach is that caregivers would
high environmental stress (Dishion et al., 2008; Izard et al., need to concomitantly shift the expectations and responses
2009; Fisher & Stoolmiller, 2008). Equally important is of others in additional environmental contexts, including,
that careful experimental designs in “real-world” contexts for example, teachers in their children’s preschools, in
have dramatically increased our ability to make clear causal order for their children’s altered forms of self-regulation to
inferences regarding the role of caregiving provided by be sustained rather than transitory. In short, canalizing
adults as a critical mediating mechanism in canalization models indicate that change in multiple, rather than single,
models of human development. environmental contexts is necessary if newly canalized
Studies of parenting training also provide some evi- trajectories of responding are to be supported over time.
dence of effects on aspects of child self-regulation, includ- While promising, the above findings provide limited
ing attention and emotion regulation (Landry, Smith, & but suggestive evidence of canalizing processes in devel-
Swank, 2006). As well, evaluations of outcomes for chil- opment and the potential malleability of development
dren experiencing extreme caregiving disruption that re- through intervention and support. Within this framework, a
sults in foster care placement provide initial support for a key question concerns whether intervening in cycles of
process by which changes in caregiving behavior are asso- maladaptive caregiving and dysregulation in parent– child
ciated with changes in stress physiology that should be interactions yields linked improvements both in child stress
conducive to executive function abilities and more reflec- physiology and self-regulation abilities. Although no inter-
tive self-regulation of behavior. Children of foster care vention studies to date have fully tested such a model, the
parents receiving training in emotionally supportive and findings described above strongly indicate the need for
contingent behavior demonstrated a more typical pattern of direct empirical examinations of this model. As well, two
diurnal cortisol change (higher morning levels and a con- important points related to the foregoing concern prenatal
sistent decline through the day) as well as lower overall experience as well as the possibility that some children may
cortisol levels (Dozier, Peloso, Lewis, Laurenceau, & be more or less sensitive or susceptible to alterations to
Levine, 2008; Fisher, Stoolmiller, Gunnar, & Burraston, experience. A substantial literature on the relation of pre-
2007). Similarly, preschool children at risk for conduct natal experience to postnatal development indicates that
disorder in families receiving an intervention to promote canalizing processes begin early and can have meaningful
responsive parenting demonstrated an appropriate increase implications for later self-regulation (Davis & Sandman,
in cortisol in anticipation of a moderate social challenge 2010; Markham, Toth, & Lickliter, 2006). Similarly, the
relative to children in a randomly assigned control group growing literature on differential susceptibility or biologi-
(Brotman et al., 2007). cal sensitivity to context suggests that temperamental and
Evidence from the obstacles and successes encoun- physiological differences among children are central to the
tered within parenting interventions also highlights the processes by which biology and experience coactively
extent to which canalizing processes are bidirectional and shape development (Ellis, Boyce, Belsky, Bakermans-
reciprocal and the extent to which attention to this reci- Kranenburg, & van Ijzendoorn, 2011).
procity, as a process of the active maintenance of patterns
of behavior, is needed to promote intervention efficacy. Alternative Pathways to Repair Through
Children’s behaviors and regulatory profiles that may have Mediating Mechanisms: Classroom-Based
been adaptive in the context of past environmental contin- Intervention
gencies may also shape future environmental contingen- Although findings emerging from the recent parenting in-
cies, eliciting continued styles of suboptimal care from terventions discussed above are promising, it is important
adults in ways that are sometimes difficult to disrupt in to underscore that behavioral change may be easier to
intervention contexts that focus only on adult behavior engineer among some parents than among others (e.g.,
change. For example, in the preventive intervention for among full-time working parents who are not able to attend
children in foster care noted above, family members extensive trainings and workshops). Further, the estimated
needed interventionists’ support in order to avoid becoming size of the effect or impact of those interventions on child
caught in an escalating cycle of rising negative arousal, outcomes is generally small and may not be sustained
biased cognitive attributions, and behavioral responses of unless the “dose” of intervention is high and continues
314 May–June 2012 ● American Psychologist
7. across several developmental periods (see Landry et al., levels in children (Fernald & Gunnar, 2009). To our knowl-
2008). A clear implication from both theoretical and policy edge, studies of antipoverty programs (such as evaluations
perspectives is that for many children, interventions target- of the benefits of the Earned Income Tax Credit and of
ing the quality of caregiving represent only partial rather conditional cash transfers) have not yet included assess-
than full solutions to children’s self-regulatory difficulty. ments of whether children’s self-regulatory trajectories are
One benefit of an experiential canalization approach is affected. However, we view this potential line of inquiry as
that multiple ecological contexts can be viewed as positive promising, with the caveat that the induction and facilita-
canalizers of self-regulation development. Those new, en- tion of new patterns of stress reactivity and behavior may
riched environmental contexts can be viewed as mediators be limited unless we are committed to substantial and
of the impact of poverty-related hazard on long-term tra- sustained efforts to intervene across ecological settings and
jectories of development (Blair, 2002). For example, re- across time.
sults from recent preschool intervention trials suggest that
exposure to cognitively stimulating and behaviorally well- Conclusion
managed classrooms benefits low-income children’s exec-
utive functioning (Bierman, Nix, Greenberg, Blair, & The evidence reviewed in the foregoing sections helps us to
Domitrovich, 2008; Diamond, Barnett, Thomas, & Munro recognize that exposure to environmental adversity is a
2007; Morris, Raver, Lloyd, & Millenky, 2009; Raver, primary shaper of development from the cellular to the
Jones, et al., 2011). An important qualification to these behavioral and social levels. Environmental exposure, as a
findings is that it remains to be seen whether interventions primary constituent of development, is like other contrib-
would benefit children to an even greater extent if both utors to development, malleable. Poverty presents a reme-
home and preschool contexts were targeted. However,
diable rather than a static set of environmental conditions
these intervention trials offer compelling evidence that
that must be borne by families and children. The environ-
out-of-home environments may serve as additional medi-
ating influences for young children’s developmental trajec- mental conditions of poverty, however, work to maintain
tories. These findings also provide powerful empirical sup- continuity by constraining change across levels of analysis.
port for the claim that new experiences of environmental Conceiving of development as a process of continuity
enrichment can be structured to capitalize on those biobe- through adaptation provides us with large, new empirical
havioral and neurocognitive processes, such as the devel- territory in which to test models of experiential canalization
opment of executive functioning, that may be “late break- and the limits of developmental change. To do that, we can
ing” in developmental time. deploy hybrid models of experimental design at the policy
This theoretically motivated recognition of stage salience level combined with careful measurement at the biobehav-
in considering experiential canalization might be profitably ioral and neurocognitive levels to detect developmental
applied to a next generation of interventions: How can neu- benefits across a broad array of pathways. Such hybrid
roendocrine and neurocognitive reorganizations that coincide models of scientific inquiry also allow us to ask whether the
with key developmental transitions in early childhood, middle timing of intervention is central to limiting the ultimate
childhood, and early adolescence be targeted through inter- developmental cost of the hazard and maximizing the op-
vention, and in what settings would such interventions have portunity for remedy.
maximal impact? We are only just beginning to understand Throughout this article we have argued that development
processes through which stress response physiology, cortico- is shaped by biology and experience coactively to promote
limbic neural circuitry, and self-regulation behavior may be specific abilities over others, in processes of gain through loss
shaped in developmental periods extending past infancy. (Gottlieb, 1997). We have argued that advances in develop-
Pressing questions regarding normative patterns of change in mental science may be powerfully fueled by recognition of the
stress physiology as well as specific biobehavioral mecha- potential trade-offs posed by a given behavior and the envi-
nisms through which change occurs need to be tested within ronmental contingencies that make such a behavior rewarded
experimental contexts offered by randomized controlled trials. and rewarding versus problematic or costly to the individual.
Experimental changes in the environmental conditions
We have also outlined new ways to conceptualize develop-
of poverty itself offer an additional, powerful way to test
mental continuity as a result of both socially and biobehav-
theoretical propositions laid out by the experiential canal-
ization approach. Do such interventions lead to reductions iorally mediated processes rather than as a result of faulty or
in psychological stress, or lower wear and tear on the part inadequate environmental input or genetic vulnerability. By
of adults and children, and are hypothesized reductions in considering the processes linking early experience, stress
allostatic load in low-income families associated with mea- physiology, and gene expression as canalizing forces that
surable changes in children’s neuroendocrine and neuro- shape the development of brain and behavior, we offer a
cognitive functioning? Although evidence is sparse, a model of development that is fundamentally plastic and re-
quasi-experimental study from the Opportunidades pover- markably complex and that veers markedly away from simple
ty-alleviation program in Mexico suggests that among chil- input– output, deficit-compensation models. In so doing, we
dren at high risk (with caregivers experiencing high de- hope to shed light on the new directions that the fields of
pressive symptoms at baseline), community-level efforts to developmental science, prevention science, and public policy
reduce poverty are associated with lower average cortisol may take in the years ahead.
May–June 2012 ● American Psychologist 315
8. REFERENCES ience in maltreated children. New Directions for Child and Adolescent
Development, 124, 47–59. doi:10.1002/cd.242
Ackerman, B. P., & Brown, E. D. (2010). Physical and psychosocial Davis, E. P., & Sandman, C. A. (2010). The timing of prenatal exposure
turmoil in the home and cognitive development. In G. Evans & T. D. to maternal cortisol and psychosocial stress is associated with human
Wachs (Eds.), Chaos and its influence on children’s development: An infant cognitive development. Child Development, 81, 131–148. doi:
ecological perspective (pp. 35– 47). Washington, DC: American Psy- 10.1111/j.1467-8624.2009.01385.x
chological Association. doi:10.1037/12057-003 Diamond, A., Barnett, W. S., Thomas, J., & Munro, S. (2007, November
Arnsten, A. F. T. (2000). Through the looking glass: Differential norad- 30). Preschool program improves cognitive control. Science, 318,
renergic modulation of prefrontal cortical function. Neural Plasticity, 7, 1387–1388. doi:10.1126/science.1151148
133–146. doi:10.1155/NP.2000.133 Dishion, T. J., Shaw, D., Connell, A., Gardner, F., Weaver, C., & Wilson,
Baltes, P. B., Staudinger, U. M., & Lindenberger, U. (1999). Lifespan M. (2008). The family check-up with high-risk indigent families: Pre-
psychology: Theory and application to intellectual functioning. Annual venting problem behavior by increasing parents’ positive behavior
Review of Psychology, 50, 471–507. doi:10.1146/annurev.psych.50 support in early childhood. Child Development, 79, 1395–1414. doi:
.1.471 10.1111/j.1467-8624.2008.01195.x
Bierman, K. L., Nix, R. L., Greenberg, M. T., Blair, C., & Domitrovich, C. E. Dozier, M. (2005). Challenges of foster care. Attachment & Human
(2008). Executive functions and school readiness intervention: Impact, Development, 7(1), 27–30. doi:10.1080/14616730500039747
moderation, and mediation in the Head Start REDI program. Development Dozier, M., Lindheim, O., Lewis, E., Bick, J., Bernard, K., & Peloso, E.
and Psychopathology, 20, 821– 843. doi:10.1017/S0954579408000394 (2009). Effects of a foster parent training program on young children’s
Blair, C. (2002). School readiness: Integrating cognition and emotion in a neu- attachment behaviors: Preliminary evidence from a randomized clinical
robiological conceptualization of children’s functioning at school entry. Amer- trial. Child & Adolescent Social Work Journal, 26, 321–332. doi:
ican Psychologist, 57, 111–127. doi:10.1037/0003-066X.57.2.111 10.1007/s10560-009-0165-1
Blair, C., Granger, D. A., Kivlighan, K. T., Mills-Koonce, R., Wil- Dozier, M., Peloso, E., Lewis, E., Laurenceau, J. P., & Levine, S. (2008).
loughby, M., Greenberg, M. T., . . . the Family Life Project Investiga- Effects of an attachment-based intervention on the cortisol production
tors. (2008). Maternal and child contributions to cortisol response to of infants and toddlers in foster care. Developmental Psychopathology,
emotional arousal in young children from low-income, rural commu- 20, 845– 859. doi:10.1017/S0954579408000400
nities. Developmental Psychology, 44, 1095–1109. doi:10.1037/0012- Duncan, G. J., & Brooks-Gunn, J. (2000). Family poverty, welfare reform,
1649.44.4.1095 and child development. Child Development, 71, 188 –196. doi:10.1111/
1467-8624.00133
Blair, C., Granger, D. Willoughby, M., Mills-Koonce, R., Cox, M.,
Ellis, B. J., Boyce, W. T., Belsky, J., Bakermans-Kranenburg, M. J., &
Greenberg, M. T., . . . the FLP Investigators. (2011). Salivary cortisol
van Ijzendoorn, M. H. (2011). Differential susceptibility to the envi-
mediates effects of poverty and parenting on executive functions in
ronment: An evolutionary-neurodevelopmental theory. Development
early childhood. Child Development, 82, 1970 –1984. doi:10.1111/
and Psychopathology, 23, 7–28. doi:10.1017/S0954579410000611
j.1467-8624.2011.01643.x
Evans, G. W. (2003). A multimethodological analysis of cumulative risk
Blair, C., Raver, C. C., Granger, D., Mills-Koonce, R., Hibel, L., & the
and allostatic load among rural children. Developmental Psychology,
Family Life Project Key Investigators. (2011). Allostasis and allostatic
39, 924 –933. doi:10.1037/0012-1649.39.5.924
load in the context of poverty in early childhood. Development and
Evans, G. W. (2004). The environment of childhood poverty. American
Psychopathology, 23, 845– 857. doi:10.1017/S0954579411000344
Psychologist, 59, 77–92. doi:10.1037/0003-066X.59.2.77
Blair, C., & Ursache, A. (2011). A bidirectional model of executive Evans, G. W., & English, K. (2002). The environment of poverty: Mul-
functions and self-regulation. In R. F. Baumeister & K. D. Vohs (Eds.), tiple stressor exposure, psychophysiological stress, and socioemotional
Handbook of self-regulation (2nd ed., pp. 300 –320). New York, NY: adjustment. Child Development, 73, 1238 –1248. doi:10.1111/1467-
Guilford Press. 8624.00469
Bradley, R. H., & Corwyn, R. F. (2002). Socioeconomic status and child Evans, G. W., & Schamberg, M. A. (2009). Childhood poverty, chronic
development. Annual Review of Psychology, 53, 371–399. doi:10.1146/ stress, and adult working memory. Proceedings of the National Acad-
annurev.psych.53.100901.135233 emy of Sciences, USA, 106, 6545– 6549. doi:10.1073/pnas.0811910106
Brooks-Gunn, J., & Duncan, G. J. (1997). The effects of poverty on Fernald, L. C., & Gunnar, M. R. (2009). Poverty-alleviation program
children. The Future of Children, 7, 55–71. doi:10.2307/1602387 participation and salivary cortisol in very low-income children. Social
Brotman, L. M., Gouley, K., Huang, K., Kamboukos, D., Fratto, C., & Science & Medicine, 68, 2180 –2189.
Pine, D. S. (2007). Effects of a psychosocial family-based preventive Fisher, P. A., & Stoolmiller, M. (2008). Intervention effects on foster
intervention on cortisol response to a social challenge in preschoolers at parent stress: Associations with child cortisol levels. Development and
high risk for antisocial behavior. Archives of General Psychiatry, 64, Psychopathology, 20, 1003–1021. doi:10.1017/S0954579408000473
1172–1179. doi:10.1001/archpsyc.64.10.1172 Fisher, P. A., Stoolmiller, M., Gunnar, M. R., & Burraston, B. O. (2007).
Brotman, L. M., Gouley, K. K., Klein, R. G., Castellanos, F. X., & Pine, Effects of a therapeutic intervention for foster preschoolers on diurnal
D. S. (2003). Children, stress, and context: Integrating basic, clinical, cortisol activity. Psychoneuroendocrinology, 32, 892–905. doi:10
and experimental prevention research. Child Development, 74, 1053– .1016/j.psyneuen.2007.06.008
1057. doi:10.1111/1467-8624.00589 Foster, H., & Brooks-Gunn, J. (2009). Toward a stress process model of
Cameron, N. M., Champagne, F. A., Parent, C., Fish, E. W., Ozaki- children’s exposure to physical family and community violence. Clin-
Kuroda, K., & Meaney, M. J. (2005). The programming of individual ical Child and Family Psychology Review, 12, 71–94. doi:10.1007/
differences in defensive responses and reproductive strategies in the rat s10567-009-0049-0
through variations in maternal care. Neuroscience and Biobehavioral Gottlieb, G. (1991). Experiential canalization of behavioral development: Theory.
Reviews, 29, 843– 865. doi:10.1016/j.neubiorev.2005.03.022 Developmental Psychology, 27, 4–13. doi:10.1037/0012-1649.27.1.4
Cerqueira, J. J., Mailliet, F., Almeida, O. F., Jay, T. M., & Sousa, N. Gottlieb, G. (1997). Synthesizing nature–nurture: Prenatal roots of in-
(2007). The prefrontal cortex as a key target of the maladaptive re- stinctive behavior. Mahwah, NJ: Erlbaum.
sponse to stress. Journal of Neuroscience, 27, 2781–2787. doi:10.1523/ Gunnar, M. R., Fisher, P. A., & the Early Experience, Stress, and Pre-
JNEUROSCI.4372-06.2007 vention Network. (2006). Bringing basic research on early experience
Champagne, D. L., Bagot, R. C., van Hasselt, F., Ramakers, G., Meaney, and stress neurobiology to bear on preventive interventions for ne-
M. J., de Kloet, E. R., . . . Krugers, H. (2008). Maternal care and glected and maltreated children. Development and Psychopathology,
hippocampal plasticity: Evidence for experience-dependent structural 18, 651– 677. doi:10.1017/S0954579406060330
plasticity, altered synaptic functioning, and differential responsiveness Hart, B., & Risley, T. (1985). Meaningful differences in the everyday experience
to glucocorticoids and stress. Journal of Neuroscience 28, 6037– 6045. of young American children. Baltimore, MD: Paul H. Brookes.
doi:10.1523/JNEUROSCI.0526-08.2008 Hibel, L. C., Granger, D. A., Blair, C., Cox, M., & the Family Life Project
Cicchetti, D., & Rogosch, F. A. (2009). Adaptive coping under conditions Investigators. (2011). Maternal sensitivity buffers the adrenocortical
of extreme stress: Multilevel influences on the determinants of resil- implications of intimate partner violence exposure during early child-
316 May–June 2012 ● American Psychologist
9. hood. Development and Psychopathology, 23, 689 –701. doi:10.1017/ residue manifested by decreased glucocorticoid and increased proin-
S0954579411000010 flammatory signaling. Proceedings of the National Academy of Sci-
Holmes, A., & Wellman, C. L. (2009). Stress-induced prefrontal reorga- ences, USA, 106, 14716 –14721. doi:10.1073/pnas.0902971106
nization and executive dysfunction in rodents. Neuroscience and Biobe- Mills-Koonce, W. R., Garrett-Peters, P., Barnett, M., Granger, D., Blair,
havioral Reviews, 33, 773–783. doi:10.1016/j.neubiorev.2008.11.005 C., Cox, M. J., & Family Life Project Key Investigators. (2011). Father
Izard, V., Sann, C., Spelke, E. S., & Streri, A. (2009). Newborn infants contributions to cortisol responses in infancy and early childhood.
perceive abstract numbers. Proceedings of the National Academy of Developmental Psychology, 47, 388 –395. doi:10.1037/a0021066
Sciences, USA, 106, 10382–10385. doi:10.1073/pnas.0812142106 Molnar, B. E., Buka, S. L., Brennan, R. T., Holton, J. K., & Earls, F.
Jackson, B., Kubzansky, L. D., Cohen, S., Weiss, S., Wright, R. J., & (2003). A multilevel study of neighborhoods and parent-to-child phys-
CARDIA Study. (2004). A matter of life and breath: Childhood socio- ical aggression: Results from the Project on Human Development in
economic status is related to young adult pulmonary function in the Chicago neighborhoods. Child Maltreatment, 8, 84 –97. doi:10.1177/
CARDIA study. International Journal of Epidemiology, 33, 271–278. 1077559502250822
doi:10.1093/ije/dyh003 Morris, P., Raver, C. C., Lloyd, C. M., & Millenky, M. (2009). Can
Karssen, A. M., Her, S., Li, J. Z., Patel, P. D., Meng, F., Bunney, W. E., teacher training in classroom management make a difference for chil-
. . . Lyons, D. M. (2007). Stress-induced changes in primate prefrontal dren’s experiences in preschool? A preview of findings from the Foun-
profiles of gene expression. Molecular Psychiatry, 12, 1089 –1102. dations of Learning Demonstration (MDRC Working Paper). Retrieved
doi:10.1038/sj.mp.4002095 from http://www.mdrc.org/publications/527/full.pdf
Kohen, D. E., Leventhal, T., Dahinten, V. S., & McIntosh, C. N. (2008). Noble, K. G., McCandliss, B. D., & Farah, M. J. (2007). Socioeconomic
Neighborhood disadvantage: Pathways of effects for young children. Child gradients predict individual differences in neurocognitive abilities. Devel-
Development, 79, 156 –169. doi:10.1111/j.1467-8624.2007.01117.x opmental Science, 10, 464 – 480. doi:10.1111/j.1467-7687.2007.00600.x
Kuhl, P. K., Williams, K. A., Lacerda, F., Stevens, K. N., & Lindblom, B. Ouellet-Morin, I., Danese, A., Bowes, L., Shakoor, S., Ambler, A., Pari-
(1992, January 31). Linguistic experience alters phonetic perception in ante, C. M., . . . Arseneault, L. (2011). A discordant monozygotic twin
infants by 6 months of age. Science, 255, pp. 606 – 608. doi:10.1126/ design shows blunted cortisol reactivity among bullied children. Jour-
science.1736364 nal of the American Academy of Child and Adolescent Psychiatry, 50,
Landry, S. H., Smith, K. E., & Swank, P. R. (2006). Responsive parenting: 574 –582. doi:10.1016/j.jaac.2011.02.015
Establishing early foundations for social, communication, and indepen- Oyama, S. (2000). The ontogeny of information: Developmental systems
dent problem-solving skills. Developmental Psychology, 42, 627– 642. and evolution (2nd ed.). Durham, NC: Duke University Press.
doi:10.1037/0012-1649.42.4.627 Patel, P. D., Katz, M., Karssen, A. M., & Lyons, D. M. (2008). Stress-
Landry, S. H., Smith, K. E., Swank, P. R., & Guttentag, C. (2008). A induced changes in corticosteroid receptor expression in primate hip-
responsive parenting intervention: The optimal timing across early pocampus and prefrontal cortex. Psychoneuroendocrinology, 33, 360 –
childhood for impacting maternal behaviors and child outcomes. Dvel- 367. doi:10.1016/j.psyneuen.2007.12.003
opmental Psychology, 44, 1335–1353. doi:10.1037/a0013030 Pollak, S. D. (2008). Mechanisms linking early experience and the emer-
Lewkowicz, D. J., & Ghazanfar, A. A. (2009). The emergence of multi- gence of emotions: Illustrations from the study of maltreated children.
sensory systems through perceptual narrowing. Trends in Cognitive Current Directions in Psychological Science, 17, 370 –375. doi:
Sciences, 13, 470 – 478. doi:10.1016/j.tics.2009.08.004 10.1111/j.1467-8721.2008.00608.x
Lickliter, R., & Honeycutt, H. (2003). Developmental dynamics: Toward Pollak, S. D., Messner, M., Kistler, D. J., & Cohn, J. F. (2009). Devel-
a biologically plausible evolutionary psychology. Psychological Bulle- opment of perceptual expertise in emotion recognition. Cognition, 110,
tin, 129, 819 – 835. doi:10.1037/0033-2909.129.6.819 242–247. doi:10.1016/j.cognition.2008.10.010
Liston, C., Miller, M. M., Goldwater, D. S., Radley, J. J., Rocher, A. B., Pollak, S. D., Vardi, S., Putzer Bechner, A. M., & Curtin, J. J. (2005).
Hof, P. R., . . . McEwen, B. S. (2006). Stress-induced alterations in Physically abused children’s regulation of attention in response to
prefrontal cortical dendritic morphology predict selective impairments hostility. Child Development, 76, 968 –977. doi:10.1111/j.1467-8624
in perceptual attentional set-shifting. Journal of Neuroscience, 26, .2005.00890.x
7870 –7874. doi:10.1523/JNEUROSCI.1184-06.2006 Pons, F., Lewkowicz, D. J., Soto-Faraco, S., & Sebastian-Galles, N.
´ ´
Liu, D., Diorio, J., Day, J. C., Francis, D. D., & Meaney, M. J. (2000). (2009). Narrowing of intersensory speech perception in infancy. Pro-
Maternal care, hippocampal neurogenesis, and cognitive development ceedings of the National Academy of Sciences, USA, 106, 10598 –
in rats. Nature Neuroscience, 3, 799 – 806. doi:10.1038/77702 10602. doi:10.1073/pnas.0904134106
Markham, R. G., Toth, G., & Lickliter, R. (2006). Prenatally elevated Radley, J. J., Arias, C. M., & Sawchenko, P. E. (2006). Regional differ-
physiological arousal interferes with perceptual learning in bobwhite entiation of the medial prefrontal cortex in regulating adaptive re-
quail (Colinus virginianus) embryos. Behavioral Neuroscience, 120, sponses to acute emotional stress. Journal of Neuroscience, 26, 12967–
1315–1325. doi:10.1037/0735-7044.120.6.1315 12976. doi:10.1523/JNEUROSCI.4297-06.2006
McLoyd, V. C. (1998). Socioeconomic disadvantage and child development. Ramos, B. P., & Arnsten, A. F. T. (2007). Adrenergic pharmacology and
American Psychologist, 53, 185–204. doi:10.1037/0003-066X.53.2.185 cognition: Focus on the prefrontal cortex. Pharmacology & Therapeu-
Meaney, M. J. (2001). Maternal care, gene expression, and the transmis- tics, 113, 523–536. doi:10.1016/j.pharmthera.2006.11.006
sion of individual differences in stress reactivity across generations. Raver, C. C., Jones, S. M., Li-Grining, C., Zhai, F., Bub, K., & Pressler,
Annual Review of Neuroscience, 24, 1161–1192. doi:10.1146/annurev E. (2011). The Chicago School Readiness Project’s impact on low-
.neuro.24.1.1161 income preschoolers’ preacademic skills: Self-regulation as a mediating
Meaney, M. J. (2010). Epigenetics and the biological definition of gene ϫ mechanism. Child Development, 82, 362–378. doi:10.1111/j.1467-
environment interactions. Child Development, 81, 41–79. doi:10.1111/ 8624.2010.01561.x
j.1467-8624.2009.01381.x Robbins, T. W., & Arnsten, A. F. (2009). The neuropsychopharmacology
Meaney, M. J., & Szyf, M. (2005). Environmental programming of stress of fronto-executive function: Monoaminergic modulation. Annual Re-
responses through DNA methylation: Life at the interface between a view of Neuroscience, 32, 267–287. doi:10.1146/annurev.neuro
dynamic environment and a fixed genome. Dialogues in Clinical Neu- .051508.135535
roscience, 7(2), 103–123. Segal, M., Richter-Levin, G., & Maggio, N. (2010). Commentary: Stress
Mendelsohn, A. L., Dreyer, B. P., Flynn, V., Tomopoulos, S., Rovira, I., induced routing of hippocampal connectivity: A hypothesis. Hippocam-
Tineo, W., . . . Nixon, A. F. (2005). Use of videotaped interactions pus, 20, 1332–1338. doi:10.1002/hipo.20751
during pediatric well-child care to promote child development: A Tolan, P. H., Gorman-Smith, D., Henry, D., & Schoeny, M. (2009). The
randomized, controlled trial. Journal of Developmental and Behavioral benefits of booster interventions: Evidence from a family-focused pre-
Pediatrics, 26, 34 – 41. vention program. Prevention Science, 10, 287–297. doi:10.1007/
Miller, G. E., Chen, E., Fok, A. K., Walker, H., Lim, A., Nicholls, E. F., s11121-009-0139-8
. . . Kobor, M. S. (2009). Low early-life social class leaves a biological Watson, T., & McLanahan, S. (2011). Marriage meets the Joneses: Rel-
May–June 2012 ● American Psychologist 317
10. ative income, identity, and marital status. Journal of Human Resources, phonetic perceptual flexibility. Applied Psycholinguistics, 7, 141–155.
46, 482–517. doi:10.1017/S0142716400007360
Webster-Stratton, C. (1998). Preventing conduct problems in Head Yuen, E. Y., Liu, W., Karatsoreos, I. N., Feng, J., McEwen, B. S., & Yan,
Start children: Strengthening parent competencies. Journal of Con- Z. (2009). Acute stress enhances glutamatergic transmission in prefron-
sulting and Clinical Psychology, 66, 715–730. doi:10.1037/0022- tal cortex and facilitates working memory. Proceedings of the National
006X.66.5.715 Academy of Sciences, USA, 106, 14075–14079. doi:10.1073/pnas
Werker, J. F., & Tees, R. C. (1986). The effect of multilingualism on .0906791106
318 May–June 2012 ● American Psychologist